/** * This is your typical header comment */ int foo(int bar) {    int idx;    int res = 0;     // trailing comment                   // that spans two lines    for (idx = 1; idx < bar; idx++)       /* comment in virtual braces */       res += idx;    res *= idx;       // some comment                      // almost continued, but a NL in between// col1 comment in level 1   return(res);}   // col1 comment in level 0